I've started working on one... icemania.servehttp.com/icemania/000.gif

Newspaz, want some help/want to work together/whatever?

In that sample image I had to load the palette from a screenshot (It looks way nicer than black and white based on the color's palette position ;p)...

Some (well.. all I suppose) of the the tiles are offset a little bit and wrap around to the next lines because of a variable number of "random" pixels between the tiles, which I'd assume have to do with the masking. I'll obviously take a closer look at it later.

EDIT: Bah.. I revived a semi-old thread. Shoot me now. ;p